SIP-H323: A Solution for Interworking Saving Existing Architecture.

In the 3rd generation multimedia communication world and in the 3GPP standardization consortium, SIP protocol appears to be the preferred signaling protocol. However, the need to communicate with non-SIP based network, e.g. H.323 from ITU-U, is still a reality. The need can be satisfied with the introduction of network gateways (also named Inter-Working Function). One of the open issues about SIP-H.323 interworking is the address resolution, in other words, the automatic forwarding of a SIP call to an H.323 user. The paper proposes a SIP network architecture which can interoperate with H.323 networks, safeguarding the existing software/hardware components, as SIP terminal clients or SIP server proxies or IWF gateways. [ABSTRACT FROM AUTHOR]